<template>
    <div>
      <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/categories' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>商品管理</el-breadcrumb-item>
        <el-breadcrumb-item>商品分类</el-breadcrumb-item>
      </el-breadcrumb>
      <el-card>
        <el-button type="primary" @click="showAddCateDialog">添加分类</el-button>
      <tree-table class="treetable" :data="catelist" :columns="columns"
                  :selection-type="false" :expand-type="false"
                  :show-index="true" index-text="#" border>
        <template slot="isok" slot-scope="scope">
          <i v-if="scope.row.cat_deleted===false " class="el-icon-success" style="color: lightgreen;"></i>
          <i class="el-icon-error" v-else style="color: red;"></i>
        </template>
        <template slot="order" slot-scope="scope">
          <el-tag v-if="scope.row.cat_level===0" size="mini">一级</el-tag>
          <el-tag v-if="scope.row.cat_level===1" type="success" size="mini">二级</el-tag>
          <el-tag v-if="scope.row.cat_level===2" type="warning" size="mini">三级</el-tag>
        </template>
        <template slot="opt" slot-scope="scope">
          <el-button icon="el-icon-edit" type="primary" size="mini">编辑</el-button>
          <el-button icon="el-icon-delete" type="danger" size="mini">删除</el-button>
        </template>
      </tree-table>
        <el-pagination
          @size-change="handleSizeChange"
          @current-change="handleCurrentChange"
          :current-page.sync="queryInfo.pagenum"
          :page-sizes="[3,5,10,15]"
          :page-size="queryInfo.pagesize"
          layout="prev, pager, next, jumper"
          :total="total">
        </el-pagination>
      </el-card>
<!--      添加分类-->
      <el-dialog
        title="添加分类"
        :visible.sync="addCateDialogVisible"
        width="50%"
        @close="addCateDialogClosed"
        >
        <el-form :model="addCateForm" :rules="addCateFormRules"
        ref="addCateFormRef"
        >
          <el-form-item label="分类名称:" prop="cat_name">
            <el-input v-model="addCateForm.cat_name"></el-input>
          </el-form-item>
          <el-form-item label="父级分类:">
            <el-cascader
              expand-trigger="hover"
              :options="parentCateList"
              v-model="selectedKeys"
              :props="cascaderProps"
              change-on-select
              @change="parentCateChanged" clearable>
            </el-cascader>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
    <el-button @click="addCateDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="addCate">确 定</el-button>
  </span>
      </el-dialog>
    </div>
</template>

<script>
export default {
  name: 'Cate',
  data() {
    return {
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5
      },
      catelist: [],
      total: 0,
      columns: [
        {
          label: '分类名称',
          prop: 'cat_name'
        },
        {
          label: '是否有效',
          type: 'template',
          template: 'isok'
        },
        {
          label: '排序',
          type: 'template',
          template: 'order'
        },
        {
          label: '操作',
          type: 'template',
          template: 'opt'
        }
      ],
      addCateDialogVisible: false,
      addCateForm: {
        cat_name: '',
        cat_pid: 0,
        cat_level: 0
      },
      addCateFormRules: {
        cat_name: [
          {required: true, message: '请输入分类的名称', trigger: 'blur'}
        ]
      },
      parentCateList: [],
      cascaderProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      selectedKeys: []
    }
  },
  methods: {
    async getCateList () {
      const {data: res} = await this.$http.get('categories', {params: this.queryInfo})
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品失败')
      }
      this.catelist = res.data.result
      this.total = res.data.total
    },
    // 监听pagesize的改变
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize
      this.getCateList()
    },
    // 监听pageNum的改变
    handleCurrentChange(newPage) {
      this.queryInfo.pagenum = newPage
      this.getCateList()
    },
    showAddCateDialog() {
      this.getParentCateList()
      this.addCateDialogVisible = true
    },
    async getParentCateList () {
      const {data: res} = await this.$http.get('categories', {params: {type: 2}})
      if (res.meta.status !== 200) return this.$message.error('获取数据失败')
      this.parentCateList = res.data
    },
    parentCateChanged () {
      if (this.selectedKeys.length > 0) {
        this.addCateForm.cat_pid = this.selectedKeys[this.selectedKeys.length - 1]
        this.addCateForm.cat_level = this.selectedKeys.length
      } else {
        this.addCateForm.cat_pid = 0
        this.addCateForm.cat_level = 0
      }
    },
    addCate() {
      this.$refs.addCateFormRef.validate(async valid => {
        if (!valid) return 0
        const {data: res} = await this.$http.post('categories', this.addCateForm)
        if (res.meta.status !== 201) {
          return this.$message.error('添加分类失败')
        }
        this.$message.success('添加分类成功')
        this.addCateDialogVisible = false
        this.getCateList()
      })
    },
    addCateDialogClosed () {
      this.$refs.addCateFormRef.resetFields()
      this.selectedKeys = []
      this.addCateForm.cat_level = 0
      this.addCateForm.cat_pid = 0
    }
  },
  created () {
    this.getCateList()
  }
}
</script>

<style scoped>
.treetable{
  margin-top: 20px;
}
  .el-cascader{
    width: 100%;
  }
</style>
